Suction-operated liquid-feed device.



W. JAY.

SUCTION OPERATED LIQUID FEED DEVICE.

APPLlCATION FILED FE8.23.1917- Patented Oct. 23, 1917.

adjustable on the rod to limit the descendin" movement,that is, the movement which ladies the valve, L, away from its seat.

The operation of the structure described is as follows:-

The several chambers being connected up as shown and described, when the engine is in operation the suction operating throu h the exhaust connection, G, from the inte e manifold of the engine to the receptacle, D, produces a condition of partial vacuum in said receptacle which causes the li uid to be withdrawn from the low'level tan C, and delivered into said receptacle, D, the discharge from which through the passage, N, is at thattime closed by the valve, M, which is in the first instance definitely held upon its seat by the weight of the float, K, and is subsequentlg' further held upon its seat by the atmosp eric pressure admitted throng 1 the atmosphere inlet pipe, H, as soon as the condition of partial vacuum arises in the receptacle, D. The inflow of the liquid fuel continuing, the float K, is lifted, first, to the 26 limitpcrmitted by the play of the collar on the valve lever, M; and having reached this height, further upward movemcntbeing resisted by the atmospheric pressure on the valve, M r-or, as it might be stated, by the suction operating to produce a partial vacuum in the receptacle, D,the float. will be halted at this position until the further rise of the liquid in the receptacle, D, increasing -the submergence of the float, K, makes the :5 upward pressure upon the float sufficient to I overcome the excess of atmos heric pressure on the valve over the diminis icd pressure in the receptacle, D, and open the valve, M, the weight of the liquid in the receptacle, D, be-

ing of coume added to the upward pull of the float for opening said valve. Such opening will occur with an instantaneous snap us the valve breaks away from its seat and the i'fioat bounds upward to the limit to which it 16ixvouldno1mally have risen upon the rise of the liquid if not restrained by its connection with the valve. In such upward snap movement the float through the lever, K", carries the valve, L, to its seat, which as it up- 30 preaches its scat is furthercugaged by the suction and-pulled to its seat, and being thus seated is thenheld 'quile firmly on. its seat by the suction. Immediately upon the snap ping open of the valve, M, there occurs an ,-intcrchange of atmospheric air admitted through the pipe, H, and posing up through the discharge passage, N, with the hqmd passingthrough said' discharge passage into the an chamber; F,,t.he 'air bubbling through the liquid in said passage and in the lower part of the receptacle, D, and eventually, 1n a second or two, or in some instances almost instantaneously, the condition of partial vacus 65. um in the receptacle, D, is destroyed, and

down from. the receptacle, D,-

the pressure therein becomes substantially atmospheric; \\'hercupou the liquid therein flows out freely into the supplemental chamber, F. With the fallin of the level of the liquid inthe receptacle, the float,'l(, tends to fall, but is at first restrained by the suctlon holding the valve, 11, to its seat; but eventually, as the li uid level continues to fall, and the float, l becomes less and less submerged, the unsupported weight of the float with its stem, becomes suflicient to pull the valve, L, olf its scat against the suction. And this action, it will be observed, will also occur with a sun as the valve breaks away from its sent, an the float, [(ylllld its stem descending quickly, oieratcs the valve, M, causing it to be seatcc, whereu on the suction now admitted freely past is valve, L, Broducing partial vacuum in the receptacle,

further assists in holding the valve,M, permanently to its seat, and the refilling of the receptacle, D, continues as at first described. It will be understood that the liquid discharged into the supplementel-cl1amber, F, is at all timw free to flow out from said chamber through the pipe, J leading to the carburetor float chamber, and charm bcr, F, being at all times exposed to atmosheric pressure through the pipe. I-I. And t will be understood that if the requirements 95 of the engine in comparison with the feedin capacity of the device are at any time such that the sup 1y of fuel discharged into the supplementa chamber, F, is in execs of the requirements, so that the chamber, F, becomes filled, that condition would eventual] extend to the receptacle, D, and the float, I would not be able to fall, but would remain at elevated position, holding the valve, L, seated, and the o rtioz. of the device would cease until the withdrawal of the liquid from the supplemental chamber, I", permitted the discharge of liquid from the receptacle, 1), into the chamber, F, whereupon the opem tion would be resumed as above described. In view of the )ossihilit of the chamber, F, being thus floo ed and t 0 liquid level rising through the pasage, N, into the chamber, D, it is important that the atmosphere inlet connection to the chamber, 1, should be extended at least as high as the liquid can possibly rise in the chamber, D, and the pipc,'H, is so shown. 5-

It will be obvious that it"is immaterial what is the nature of theliquid-fedby this device and that itmaybenmployed to su plv oilfor lubrication emu as to supplfv oil for fuel.

To facilitate scatin of the valve, M, it may be mounted loose y on a centering stud, 1a., onthe'lever, M, andrctuiucd bv a cotter pin, or, the eentraluportiu-c. mi; by which, it is thus mounted being closed when the valve is seated, b3, the tapered shoulder, m, at the base-0f the stud. a :180

new

I claims- 1. In combination with a main lowlevel liquid supply tank, a liquid "sup l'y receplocated in a plane above said tank and closed except as to the connections hereinafter indicated; a supplemental chamber connected with said receptacle for dischar e of liquid by gravity from said receptac e into said supplemental chamber; a supply connection from the main tank to said receptacle, and an exhaust connection to said receptacle for reducing the pressure therein below that of the atmosphere; on atmosphere inlet connection to the upper part of said supplemental chamber; a valve controlling the communication of said receptacle with said supplemental chamber, and means in said receptacle for opening and closing said valve at predetermined high an? low levels of the liquid in said receptac e;

2. In combination with a main low level liquid supply tank, a liquid supply receptacle located in a plane above sal tank and closed except as to connections hereinafter vmentioned; a liquid supply connection from said tank to said receptacle; a supplemen- 'tal chamber, connections from said receptacle to said supplemental chamber for dis charge of liquid by gravity from the receptacle into the chamber; an exhaust connection to said receptacle for reducing the pres sure therein below that of theiatmosphereg an atmosphere inlet connection to the up er part of said supplemental chamber; a va ve which controls the discharge of liquid from the receptacle the suppleme ital chamher; a float deie in said receptacle and operating conn tions therefrom to the valve for opening and closing the latter accorlding to the height of liquid in the receptac e.

3. In combination with a main low level liquid supply tank, a liquid supply recep tacle located in a plane above said tank and closed except as to connections hereinafter mentioned; a liquid suppl connectionjrom said tank to said receptac e; a suppplemental chamber and connections from the receptacle to said chamber for discharge of liquid by gravity from the receptacle into the chamber; an exhaust connection to the receptacle for reducing the pressure therein below that of the atmosphere; an atmos-. phere inlet connection to the upper part of the supplemental chamber; a valve which controls the communication of the rece tacle with the chamber, positioned so as to e as sisted in opening by the ravity flow of the liquid from the receptac e into the chamher; a device in the receptacle which is op erated in one direction by the accumulation of liquid in the receptacle and in the opposite direction by the withdrawal of liquid from the receptacle; operating connections from said device to said valve for positively opening and closing it, the passage which connects the receptacle with the supplemental chamber being large for free and rapiddischarge of the liquid from the receptacle into the chamber, whereby it is adapted also to permit the movement of air from the chamber'into the receptacle simultaneously with the movement of liquid from the re ceptacle into the chamber In combination with a main low level liquid supply tank, a liquid supply receptacle located in a plane above said tag? and closed except as to the connections hereinafter mentioned; a supplemental chamber and liquid discharge connections froni the receptacle to said supplemental chamber adapted to permit discharge by gravity from the receptacle to the chamber; exhaust connections to the receptacle for reducing the pressure in said receptacle below that of the atmosphere; a valve which controls the liquid discharge connection from the receptacle to the chamber; a valve which controls the connection to the receptacle; a float in the receptacle and mechanical connections by which it operates both said and substantially closed except as to connections hereinafter mentioned; a liquid supply connection from the tank to the receptacle; a supplemental chamber and a liquid discharge connection from the receptacle to said supp emental chamber; an atmos here inlet connection to said supplemental c amber for admitting air to the receptacle through the liquid discharge connection therefrom to the chamber; a valve which controls said discharge connection a valve which controls the exhaust connection to the receptacle; a float in the rece tacle and mechanicdl, connections from the oat to both said yalves for operating them by the rising and fallin of the float in change of level of the. liqui in. said receptacle, said connections being adapted to open thedischarge-controlling valve and close the exhaust-controlling valve when the float rises, and reversely operate said valves when the float falls, the exhaust-controlling valve bein positioned with respect to its seat for being held thereto by the suction when seated.

6. In combination with a main low level said supplemental chamber; an atmosphere inlet connection to said supplemental chain her for admittin air to the receptacle through the liquid discharge connection therefrom to the chamber; a valve which controls said discharge coni'iectiom'a valve which controls the exhaust connection to the.

receptacle; a float in the receptacle and mechanical connections from the float to both said valves for operating them by the rising and falling of the float in change of level of the liquid in said receptacle, said connections being adapted to open the dis charge-0ontrolling valve and close the ex haust-controlling valve when the float rises, and reversely operate said valve when the float falls, said discharge-controlling valve being positioned with respect to its seat for being held thereto by the suction when the exhaust-controlling valve is open.

7. In combination with a main low level liquid supply tank; a liquid supply receptacle located, in a plane above said tank and substantially closed except as to connections hereinafter mentioned; a liquid supply connection from the tank to the receptacle a supplemental chamber and a liquid ischarge connection from the receptacle to said supplemental chamber; an atmosphere inlet connection to said supplemental chamber for admittin air to the receptacle throu h the liquid discharge connection therefrom to the chamber; a valve which controls said discharge connection; a valve which controls the exhaust connection to the receptacle; a float in the receptacle and mechanical connections from the float to both said valves for operating themby the rising and. falling othe float in change of level of the liquid in said receptacle, said connections being adapted to open the dischargecontrolling valve and close the exhaust-controlling valve when the float rises,

and reverscly operate said valve when the float falls, both of said valves bein positioned with respect to their seats for aving their opening resisted by the suction.

In testimony whereof, I have hereunto set my hand at Chicago, Illinois, this 21st day of February, 1917.

WEBB JAY. 

